chunked-encoding trailer.

  http://curl.haxx.se/bug/view.cgi?id=2958474

fix sizeof short

Added SIZEOF_INT and SIZEOF_SHORT definitions for non-configure systems

Added SIZEOF_INT definition

fix compiler warning

fix compiler warning

fix compiler warning

fix file name

Fixed bug report #2958074 indicating
(http://curl.haxx.se/bug/view.cgi?id=2958074) that curl on Windows with
option --trace-time did not use local time when timestamping trace lines.
This could also happen on other systems depending on time souurce.

enable 802 and 803

fix compiler warning

fix compiler warning

fix compiler warning

fix socket data type

fix socket data type and logging format in debug tracking socket functions

convert Curl_ultous() and Curl_ultouc() functions to curlx_ultous() and
curlx_ultouc(), exposing them through curlx.h to allow proper code reuse
later in our test harness.

updated sources

- SMTP falls back to RFC821 HELO when EHLO fails (and SSL is not required).
- Use of true local host name (i.e.: via gethostname()) when available, as default argument to SMTP HELO/EHLO.
- Test case 804 for HELO fallback.

add header inclusion

fix compiler warning

fix compiler warning

  properly in angle brackets. Recipients provided with CURLOPT_MAIL_RCPT now
  get angle bracket wrapping automatically by libcurl unless the recipient
  starts with an angle bracket as then the app is assumed to deal with that
  properly on its own.

  full DATA has been sent, and I modified the test SMTP server to also send
  that response. As usual, the DONE operation that is made after a completed
  transfer is still not doable in a non-blocking way so this waiting for 250
  is unfortunately made blockingly.

fix compiler warning

fix compiler warning

fix compiler warning

fix compiler warning

fix compiler warning

- To allow an app to force a re-read of /etc/resolv.conf etc, pretty much
  like the res_init() resolver function offers

replaced tabs with spaces

fix Content-Length validation

fix compiler warning: conversion from "long" to "size_t" may lose sign